It is feared that Russian spies planted a device on a plane and caused a fire at a UK warehouse.
Counter-terrorism police are investigating a fire at a DHL warehouse in Birmingham amid fears of a growing number of Kremlin-led sabotage plots.
No one was injured in the July fire until it was extinguished.
However, a similar incident in Leipzig, Germany, has raised concerns that it is part of a broader Russian operation to carry out arson and sabotage plots in Europe.
This is understood to be primarily aimed at weakening military aid to Ukraine and dividing the West.
A Met Police counter-terrorism spokeswoman said: “We can confirm that counter-terrorism police officers are investigating an incident at a commercial premises in Midpoint Way, Minworth.”
“On Monday, July 22nd, a package at that location caught fire. Staff and local fire services responded at the time, but no injuries or significant damage were reported.
“Authorities are working with other European law enforcement partners to determine whether this is related to other similar types of incidents across Europe.”
Seven men have been charged with Russian conspiracy after a suspected arson fire broke out at a warehouse belonging to a Ukrainian company in east London in March.
Logistics company DHL said the package that started burning in Germany was originally posted from Lithuania.
It was about to be loaded onto a plane, and German intelligence chiefs warned it could cause a catastrophe.
MI5 chief Ken McCallum said Russia and Iran were on a mission to cause “mayhem” with increased plots of arson, murder, kidnapping and sabotage.
He warned that the threat Moscow poses to Britain’s streets is “worsening”.
Mr McCallum said Russia’s GRU intelligence agency, which was responsible for the 2018 Salisbury Novichok poisoning, was behind the “ongoing mission” and said Putin’s “minions” were “developing false hopes of weakening”. “We are intensifying arson and vandalism across Europe,” he added. Western determination.”
Britain’s intelligence chief has said Russia and Iran are hiring criminals to carry out their “dirty work” and are acting with “increasing recklessness”.
So far this year, at least 24 people have been arrested on suspicion of being saboteurs scouted by Russia’s spy chief.
A spate of fires at weapons factories and military-related industrial facilities in Western countries has put intelligence chiefs on high alert. The suspected plot locations were found in London, Germany, the Czech Republic and Sweden.
Speaking at the Counter Terrorism Operations Center in west London on Tuesday, Mr McCallum said: “In the last year alone, the number of national threat investigations we conduct has soared by 48 per cent.
“A more striking change this year is that Russian state actors have increasingly relied on proxies to do their dirty work, including British and third-country private intelligence agents and criminals.
“While changing MI5’s detection agenda, the use of Russian proxies further reduces the professionalism of their operations and increases our destructive options in the absence of diplomatic immunity.”
Britain should “expect continued domestic aggression” by Russia.